金沙磷矿反浮选尾砂胶结充填试验研究  

Experimental Study on Cemented Backfill of Tailings from Reverse Flotation of Jinsha Phosphate Mine

作　　者：李斌 段林松 吴红云 刘忠强 魏晓明 李文臣 LI Bin;DUAN Linsong;WU Hongyun;LIU Zhongqiang;WEI Xiaoming;LI Wenchen(Yongshan Jinsha Mining Co.,Ltd.;BGRIMM Technology Group)

机构地区：[1]永善金沙矿业有限责任公司 [2]矿冶科技集团有限公司

出　　处：《现代矿业》2024年第4期236-240,共5页Modern Mining

基　　金：国家自然科学基金青年基金项目(编号:52104131);矿冶科技集团青年创新基金项目(编号:04-2342)。

摘　　要：云南金沙矿业磷矿为了延长尾矿库服务年限和治理采空区,亟需开展磷矿充填试验研究,为充填系统工艺设计提供基础数据。通过对矿山充填材料的现场取样测试,分析了磷矿尾砂的物化性质参数。根据充填料浆流动性能、泌水率及充填配比试验,综合确定了充填浓度、灰砂比等影响因素对充填体力学性能的影响规律。基于扫描电镜-能谱仪(SEM-EDS)微观测试手段,分析了充填体强度增长机制,水泥水化生成纤维状C—S—H凝胶与细尾砂颗粒搭接形成整体,并填充试件内部孔隙,是充填体强度增长的主要原因。研究成果可为确定国内类似磷矿矿山尾砂胶结充填提供参考。In order to extend the service life of the tailings pond and treating the goaf,it is urgently necessary to carry out experimental research on phosphate filling in Jinsha phosphate mine,providing basic data for the process design of the backfill system.By sampling of filling materials,the physical and chemical properties parameters of phosphate tailings were tested and analyzed.Based on the flow performance,bleeding rate,and filling ratio test of the filling slurry,the influence of factors such as filling concentration and sand-ratio on the mechanical properties of the backfill was comprehensively determined.Furthermore,the strength growth mechanism of the backfill was analyzed by SEM-EDS microscopic test method.The main reason for the strength growth of the backfill was that the cement hydrated to form fibrous C-S-H gel,overlapped with fine tailings particles to form a whole,and filled the internal pores of the specimen.The research results can provide reference for determining the cemented filling parameters of tailings in similar phosphate mines in China.

关 键 词：磷矿尾砂 胶结充填 流动性能 泌水率 充填体强度 

分 类 号：TD853.34[矿业工程—金属矿开采] TD926.4[矿业工程—矿山开采]